When you think about planets and moons that resemble Earth, you’d probably think of Venus, Mars, or the Moon. But if you’re ...

That's because it is the only planet or moon in the solar system ... of hydrocarbons like methane and ethane. Still, the ...

Why it's so special: This picture was taken by the European Space Agency's Huygens probe during its historic parachute descent onto Titan's surface on Jan. 14, 2005. At the moment this image was ...

Twenty years ago today, I watched TV coverage of a probe descending toward the surface of Titan, a moon of Saturn ... Part of the planet is shadowed, blending into the cobalt-turquoise sky.